Specification: Input voltage: DC15-22V Out Power: 30W * 2+ 60W Plate size: 115.7 * 125.7MM Opening size: 96 * 106MM position: 2.5MM The following is our new shelves subwoofer amplifier board, because our subwoofer speakers are very comprehensive, many buyers strongly recommend that we out of the subwoofer amplifier board. In this regard, we do have to consider the inadequacies of place, just our horn speakers are unified in accordance with national standards. On the power amplifier board is indeed imminent. After six months of preparation, the planning of three high-quality subwoofer amplifier board has been released, the three amplifier board basically covers the entire civil audio. Especially the SW-501 also comes with 2.0 independent channel output, you can easily achieve 2.1 speaker system. 3 types amplifier board are all full chip technology, all with aluminum backplane, there is almost no noise floor, but also good control. Is a rare home theater subwoofer amplifier board. Package includes: 1pc